140 lines
3.5 KiB
PHP
140 lines
3.5 KiB
PHP
<?php
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/**
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* To convert a gpx file:
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* 1. Add file <file_name>.gpx to geo/ folder
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* 2. Assign file to project: UPDATE projects SET geofile = '<file_name>' WHERE id_project = <id_project>;
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*/
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class Converter extends PhpObject {
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public function __construct() {
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parent::__construct(__CLASS__, Settings::DEBUG);
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}
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public function convertToGeoJson($sFileName) {
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$sGpxFileName = $sFileName.Gpx::EXT;
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$sGeoJsonFileName = $sFileName.GeoJson::EXT;
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$oGpx = new Gpx($sGpxFileName);
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$oGeoJson = new GeoJson($sGeoJsonFileName);
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$oGeoJson->setTracks($oGpx->getTracks());
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$oGeoJson->saveFile();
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}
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public static function isGeoJsonValid($sFileName) {
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$bResult = false;
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$sGeoJsonFilePath = Geo::getFilePath($sFileName);
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if(file_exists($sGeoJsonFilePath)) {
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if(filemtime($sGeoJsonFilePath) > filemtime(Geo::getFilePath($sFileName, Gpx::EXT))) $bResult = true;
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}
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return $bResult;
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}
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}
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class Geo extends PhpObject {
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const GEO_FOLDER = 'geo/';
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protected $asTracks;
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protected $sFilePath;
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public function __construct($sFileName) {
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parent::__construct(__CLASS__, Settings::DEBUG);
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$this->sFilePath = self::GEO_FOLDER.$sFileName;
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$this->asTracks = array();
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}
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public static function getFilePath($sFileName, $sExt=GeoJson::EXT) {
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return self::GEO_FOLDER.$sFileName.$sExt;
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}
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}
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class Gpx extends Geo {
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const EXT = '.gpx';
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public function __construct($sFileName) {
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parent::__construct($sFileName);
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$this->parseFile();
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}
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public function getTracks() {
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return $this->asTracks;
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}
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private function parseFile() {
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$oXml = simplexml_load_file($this->sFilePath);
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foreach($oXml->trk as $aoTrack) {
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$asTrack = array(
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'name' => (string) $aoTrack->name,
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'desc' => str_replace("\n", '', ToolBox::fixEOL((strip_tags($aoTrack->desc)))),
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'color' => (string) $aoTrack->extensions->children('gpxx', true)->TrackExtension->DisplayColor,
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'points'=> array()
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);
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foreach($aoTrack->trkseg as $asSegment) {
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foreach($asSegment as $asPoint) {
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$asTrack['points'][] = array(
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'lon' => (float) $asPoint['lon'],
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'lat' => (float) $asPoint['lat'],
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'ele' => (int) $asPoint->ele
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);
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}
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}
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$this->asTracks[] = $asTrack;
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}
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}
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}
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class GeoJson extends Geo {
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const EXT = '.geojson';
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public function __construct($sFileName) {
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parent::__construct($sFileName);
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}
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public function setTracks($asTracks) {
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$this->asTracks = $asTracks;
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}
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public function saveFile() {
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$sContent = json_encode($this->getGeoJson());
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file_put_contents($this->sFilePath, $sContent);
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}
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private function getGeoJson() {
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$asTracks = array('features'=>array());
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foreach($this->asTracks as $asTrackProps) {
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//Color mapping
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switch($asTrackProps['color']) {
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case 'LightGray': continue 2; //discard track
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case 'Magenta': $sType = 'off-track'; break;
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case 'Red': $sType = 'hitchhiking'; break;
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default: $sType = 'main'; break;
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}
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$asTrack = array(
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'type' => 'Feature',
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'properties' => array(
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'name' => $asTrackProps['name'],
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'type' => $sType,
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'description' => $asTrackProps['desc']
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),
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'geometry' => array(
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'type' => 'LineString',
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'coordinates' => array()
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)
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);
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foreach($asTrackProps['points'] as $asPoint) {
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$asTrack['geometry']['coordinates'][] = array_values($asPoint);
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}
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$asTracks['features'][] = $asTrack;
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}
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return $asTracks;
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}
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} |